Introduction
Thank you for choosing the Efomao Big and Tall Office Chair. This manual provides detailed instructions for assembly, operation, maintenance, and troubleshooting to ensure you get the most comfortable and durable experience from your new office chair. Designed for long hours, this executive desk chair features a saddle-shaped seat with molded wood, sofa-style spring cushions, and a spine-conforming backrest, comfortably supporting up to 400 pounds.
Figure 1: Efomao Big and Tall Office Chair (Green Leather variant shown)
Important Safety Information
Please read and understand all instructions before assembling and using this chair. Keep this manual for future reference.
- Ensure all parts are present and undamaged before assembly. Do not use if any parts are missing or broken.
- Assemble the chair on a soft, clean surface to prevent scratches.
- Do not overtighten screws during assembly, as this may damage the threads or components.
- This chair is designed to support a maximum weight of 400 pounds. Do not exceed this weight limit.
- Do not stand on the chair or use it as a step stool.
- Keep children and pets away from the assembly area.
- Regularly check all bolts and screws to ensure they remain tight. Retighten as necessary.
- Use the chair only for its intended purpose as an office chair.
Parts List
Before beginning assembly, verify that all components listed below are included in your package:
| Part | Description | Quantity |
|---|---|---|
| A | Chair Backrest | 1 |
| B | Seat Cushion Assembly (with footrest mechanism) | 1 |
| C | Armrests (Left & Right) | 2 |
| D | Star Base | 1 |
| E | Gas Lift Cylinder (SGS-certified 4-level) | 1 |
| F | Casters (Wheels) | 5 |
| G | Lumbar Support Pillow | 1 |
| H | Hardware Pack (screws, wrench) | 1 |
Figure 2: Chair Dimensions and Key Components
Assembly Instructions
Assembly typically takes 20-30 minutes. All necessary tools are included in the hardware pack.
- Attach Casters to Base: Insert the five casters (F) into the holes at the end of each leg of the star base (D). Push firmly until they click into place.
- Insert Gas Lift: Place the gas lift cylinder (E) into the center hole of the star base (D).
- Attach Armrests to Seat: Secure the armrests (C) to the underside of the seat cushion assembly (B) using the provided screws from the hardware pack (H). Ensure the armrests are oriented correctly (left and right).
- Attach Backrest to Seat: Connect the chair backrest (A) to the seat cushion assembly (B) using the designated screws.
- Connect Seat Assembly to Gas Lift: Carefully place the assembled seat and backrest onto the gas lift cylinder (E), ensuring the center mechanism aligns with the top of the gas lift. Press down firmly to secure.
- Attach Lumbar Pillow: Position the lumbar support pillow (G) on the backrest for optimal comfort.
Note: Refer to the detailed diagrams in your included assembly guide for specific screw locations and orientations.
Operating Instructions
Chair Height Adjustment
To adjust the chair height, pull the lever located on the right side of the seat upwards. To raise the chair, lift the lever while taking your weight off the seat. To lower the chair, lift the lever while remaining seated.
Backrest Recline Function
This chair features a recline function from 90° to 135°. To recline, locate the hidden adjustment handle under the seat. Pull it out and turn to adjust, then push it in to lock the backrest angle. This allows for customized comfort, whether working upright or relaxing.
Figure 3: Backrest Recline Function (90° to 135°)
Adjustable Armrests
The armrests are adjustable to reduce arm pressure and make work more comfortable. To adjust the height, press the button on the side of the armrest and move it up or down to your desired position. The armrests can also be adjusted front and rear, and can be hidden under the table for convenience.
Figure 4: Adjustable Armrest Height
Retractable Footrest
For added comfort, especially during reclined positions or for users who prefer a cross-legged sitting position, the chair includes a retractable footrest. Pull the footrest out from under the seat when needed, and push it back in for storage.
Figure 5: Using the Retractable Footrest for Comfort
Ergonomic Support Features
The Efomao office chair is designed with ergonomic features for optimal support:
- Head Support: Perfectly fits the head and neck.
- Back Support: Provides a fully wrapped feel for your back.
- Lumbar Support: Softly supports your waist with an adjustable lumbar pillow.
Figure 6: Ergonomic Zoned Support
The seat cushion features sofa-style spring cushions and dual-layer memory foam with a saddle-shaped design for enhanced comfort and pressure relief, preventing fatigue during long sitting periods.
Figure 7: Spring Cushion & Mould Foam Design
Care and Maintenance
Proper care will extend the life and appearance of your Efomao office chair.
- Cleaning: For general cleaning, wipe the chair with a soft, damp cloth. For leather surfaces, use a mild leather cleaner as directed by the product manufacturer. Avoid harsh chemicals or abrasive cleaners.
- Spills: Blot spills immediately with a clean, dry cloth. Do not rub, as this can spread the stain.
- Inspection: Periodically inspect all bolts and screws to ensure they are tight. Re-tighten if necessary to maintain stability and safety.
- Movement: When moving the chair, lift it rather than dragging it to prevent damage to the base or floor.
- Environment: Avoid exposing the chair to direct sunlight or extreme temperatures, which can cause the material to fade or crack.
Troubleshooting
If you encounter any issues with your Efomao office chair, refer to the common problems and solutions below:
| Problem | Possible Cause | Solution |
|---|---|---|
| Chair wobbles or feels unstable | Loose screws or uneven assembly. | Check and tighten all screws, especially those connecting the seat, backrest, and armrests. Ensure the base is level. |
| Gas lift not adjusting height | Lever not fully engaged or gas lift malfunction. | Ensure the height adjustment lever is pulled completely. If the issue persists, the gas lift may need replacement. Contact customer support. |
| Casters not rolling smoothly | Debris in casters or unsuitable flooring. | Clean any hair or debris from the caster wheels. For carpeted floors, consider requesting rubber casters from customer support for smoother movement. |
| Backrest not reclining or locking | Recline mechanism not engaged correctly. | Ensure the recline adjustment handle is fully pulled out to adjust and pushed in to lock. Check for any obstructions. |
Product Specifications
- Brand: Efomao
- Model Name: Big and Tall Office Chair 400lbs
- Color: Green Leather (other variants available)
- Product Dimensions: 27.6"D x 27.6"W x 52.3"H
- Maximum Weight Recommendation: 400 Pounds
- Material: Sofa-style spring cushions, dual-layer memory foam, Leather upholstery
- Special Features: Arm Rest, Ergonomic, Foot Rest, Reclining, Upholstered Leather
- Back Style: Solid Back
- Reclining Position Count: 2 (90° to 135°)
- Gas Lift: SGS-certified 4-level gas cylinder
- Item Weight: 52 pounds
- ASIN: B0DT7CWHM9
- Date First Available: January 16, 2025
Warranty and Support
Efomao is committed to providing comprehensive customer service and support for your product. The chair is designed to meet BIFMA standards for durability and safety.
For any inquiries, missing parts, or issues not covered in the troubleshooting section, please contact Efomao customer service. Additional components, such as rubber casters and a 1-inch gas cylinder, can be provided upon request to ensure optimal product performance.
Please refer to your purchase documentation for specific warranty terms and conditions.